If I were in your situation, I too would be upset. I would think that if you were able to prove that this is how it was before you moved and then again after you moved and that it works for all parties involved that the judge would have no problem. I have heard that judges do not favor the option, but I do know a family who shares 50-50. My sister-in-law has 50-50 custody of her daughter, Litterally. My neice lives with her father from september until march and see's her mother on most weekends. From March until Sept she lives with her mother and see her father on most weekends. I know in most cases a 50-50 split like that doesn't always work for everyone, but it does for this family. It really all depends on the judge. But even if your husband ex fights him on the legal issues of the split, that if the judge sees how she had been and continued to be alright with the split they just might grant your request. What about instead of pulling her back into court, maybe you could try to get her to solve the issue through mediation. Its kind of a nicer, calmer way rather then court. But when all is said and done, the mediation order will hold up in court the same as a court order. Here in NY, you can go through the BBB. Their service is free, but it is also completely volentary, by all parties. So if the other party is not willing, that route will not be possible. I wish your family luck with this situation. Hopefully his ex will consider what is in the best interest of their daughter, not how she will be loosing $500 a month.